The secret erotic development of a grandfather who drives an innocent girl crazy - memories of being trained in that summer countryside

The country town began to hear the cicadas crying in early summer. When Ichika returned home from school, her mother crawled to the floor. "What should I do? I can't volunteer with this..." She said, seeing her mother suffering from a back injury, and insisted that she would go, heading to the elderly man's house alone. The elderly person lives alone and is said to be unable to live his daily life without support. However, Ichika didn't know. This old man is so terribly sexy, young and innocent, and has set his sights on him...